31112201121 has 16 divisors (see below), whose sum is σ = 42845419008. Its totient is φ = 20060985600.

The previous prime is 31112201119. The next prime is 31112201147. The reversal of 31112201121 is 12110221113.

It is not a de Polignac number, because 31112201121 - 2¹ = 31112201119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31112201121.

It is not an unprimeable number, because it can be changed into a prime (31112201101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71131 + ... + 259391.

It is an arithmetic number, because the mean of its divisors is an integer number (2677838688).

Almost surely, 2^31112201121 is an apocalyptic number.

31112201121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31112201121 is a deficient number, since it is larger than the sum of its proper divisors (11733217887).

31112201121 is a wasteful number, since it uses less digits than its factorization.

31112201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190072.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 31112201121 its reverse (12110221113), we get a palindrome (43222422234).

The spelling of 31112201121 in words is "thirty-one billion, one hundred twelve million, two hundred one thousand, one hundred twenty-one".